Knowing office rules—whether _______ or not—is important, especially for young job seekers.

A. written                                                        B. writing

C. being written                                        D. having been written

 Knowing office rules—whether _______ or not—is important, especially for young job seekers.

A. written                                                        B. writing

C. being written                                        D. having been written

Knowing office rules -- whether ______ or not -- is important, especially for young job seekers.

A. written　　　 B. writing　　　 C. being written 　 D. having been written

Knowing office rules -- whether ______ or not -- is important, especially for young job seekers.